/// <summary>
/// Restore a <seealso cref="ForUtil"/> from a <seealso cref="DataInput"/>.
/// </summary>
public ForUtil(DataInput @in)
{
int packedIntsVersion = @in.ReadVInt();
PackedInts.CheckVersion(packedIntsVersion);
EncodedSizes = new int[33];
Encoders = new PackedInts.Encoder[33];
Decoders = new PackedInts.Decoder[33];
Iterations = new int[33];
for (int bpv = 1; bpv <= 32; ++bpv)
{
var code = @in.ReadVInt();
var formatId = (int)((uint)code >> 5);
var bitsPerValue = (code & 31) + 1;
PackedInts.Format format = PackedInts.Format.ById(formatId);
Debug.Assert(format.IsSupported(bitsPerValue));
EncodedSizes[bpv] = EncodedSize(format, packedIntsVersion, bitsPerValue);
Encoders[bpv] = PackedInts.GetEncoder(format, packedIntsVersion, bitsPerValue);
Decoders[bpv] = PackedInts.GetDecoder(format, packedIntsVersion, bitsPerValue);
Iterations[bpv] = ComputeIterations(Decoders[bpv]);
}
}